Corrugated container and method and apparatus for manufacturing the same

ABSTRACT

The present invention relates to the stitchless tubular container and the stitchless box container and the method and the apparatus for manufacturing the same, which containers are produced from material strips by the successive process which comprises the step of making a tubular body, whereby the corrugated strips with their flutes obliquely or longitudinally flowed in the axial direction are superposed on the liner strips, the adjacent edges of adjacent convolutions thereof are overlapped each other, the step of making longitudinal creases on the tubular body, the step of gradually flattening the tubular body thus obtained and finally severing said flat tubular body into individual corrugated containers.

United States atent 1 Miyalke et a1.

[54] CORRUGATED CONTAINER AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME [75] Inventors: Hajime Miyake, Osaka; Akio Hayama, Kobe, both of Japan Kabushiki Kaisha Nisso, Osaka, Japan [22] Filed: Dec. 18, 1970 [21] App1.No.: 99,634

[73] Assignee:

[30] Foreign Application Priority Data [56] References Cited UNITED STATES PATENTS 3,610,115 10/1971 Rose et al ..93/80 ,9 a) 264 r pd 1 1 May 115, i973 3,068,934 12/1962 Mauck et al ..93/8O UX R25,820 7/1965 Macchione t 1 1 c ..93/94 PS 1,985,997 1/1935 Keeran 1 4.93/94 PS 3,137,217 6/1964 Elliott ..93/94 PS Primary ExaminerAndrew R. Juhasz Assistant Examiner]ames F. Coan A rtorney- Wenderoth, Land & Ponack [57] ABSTRACT The present invention relates to the stitchless tubular container and the stitchless box container and the method and the apparatus for manufacturing the same, which containers are produced from material strips by the successive process which comprises the step of making a tubular body, whereby the corrugated strips with their flutes obliquely'or longitudinally flowed in the axial direction are superposed on the liner strips, the adjacent edges of adjacent convolutions thereof are overlapped each other, the step of making longitudinal creases on the tubular body, the step of gradually flattening the tubular body thus obtained and finally severing said flat tubular body into individual corrugated containers.

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ATTORNEY S PAIENTED MAY 9973 SHEET 13 [1F 21 HAJIME MIYAKE and AKI' IIAYAMA,

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INVENTORS BYMMM Q ATTORNEYS PATENIEU m 1 5 i975 SHEET 15 0F 21 UAJIME I-IIYAKE and AKIO HAYAMA,

INVENTORS sy rmmwtlp, v @Mmdv ATTORNEYS PATENTEBKAY] 5197a SHEET 18 [1F 21 HAJIME MIYAKE and AKIO HAYAMA,

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INVEIVI'OR S PATENTED 3.732790 SHEET 19 [1F 21 HAJIME MIYAKE and AKIO HAYAMA,

INVENTORS Emil/limb, $1101; 90M

ATTORNEYS 

1. A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel at least one liner strip for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, removing the tube from the mandrel and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers.
 2. A method as claimed in claim 1, further comprising the steps of slotting said corrugated tube at longitudinally spaced intervals and making longitudinally spaced transverse folds or creases in said tube.
 3. A method as claimed in claim 1 in which the steps of supplying at least one liner strip comprises supplying two opposed liner strips, one being supplied prior to winding the corrugated strip and the second being supplied for winding over said corrugated strip.
 4. A method of continuously producing folded, corrugated containers, comprising the steps of supplying to a rotating mandrel which gradually becomes flatter from one end toward the other at least one liner from a direction oblique to the axis of rotation of the mandrel for spirally winding the liner strip on the mandrel with the trailing edge of each spire of the wound strip overlapping the leading edge of the preceding spire, forming at least one corrugated strip having successive concave and convex flutes extending transversely thereof with the flutes having a different radius of curvature at each end thereof with the one ends of successive concave and convex flutes having a larger radius of curvature and a smaller radius of curvature and the other ends of the corresponding flutes having a smaller radius of curvature and a larger radius of curvature, applying adhesive to the thus formed corrugated strip, supplying the corrugated strip to the rotating mandrel from a point spaced along the mandrel from the supply point of the liner strip and from a direction oblique to the axis of rotation of the mandrel for spirally winding the corrugated strip on the mandrel over the liner strip and adhering the corrugated strip to the winding strip, with the trailing edge of each spire of the wound corrugated strip overlapping the leading edge of the preceding spire of the corrugated strip with the larger one ends of the convex flute ends fitting over the smaller convex flute ends, and the smaller concave flute ends fitting into the larger concave flute ends, whereby the liner and corrugated strip are formed as a unit into an endless corrugated tube, forming longitudinal folds or creases in the tube, feeding the tube along the mandrel toward the flattened end and gradually flattening the tube, and cutting the flattened tube into lengths appropriate for individual containers. 